cas_cache: fix "blk_update_request: operation not supported" error #1213
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A write request with the REQ_RAHEAD flag enabled cause the nvme driver to send a write command with access frequency value that is reserved (at least on specification version 1.4c). NVME devices might fail this write command with an unsupported error. So we now clear the request's flag based on its direction. Signed-off-by: Gal Hammer <gal.hammer@huawei.com> Signed-off-by: Shai Fultheim <shai.fultheim@huawei.com>
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Can one of the admins verify this patch? |
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@CAS-Linux-Jenkins ok to test |
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Anyone? Thanks, Gal. |
karolinavelkaja
requested review from
rafalste,
arutk,
jfckm,
kmajzero,
mmichal10 and
robertbaldyga
rafalste
approved these changes
Aug 19, 2022
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A write request with the REQ_RAHEAD flag enabled cause the nvme driver
to send a write command with access frequency value that is reserved
(at least on specification version 1.4c). NVME devices might fail this
write command with an unsupported error. So we now clear the request's
flags based on its direction.
Signed-off-by: Gal Hammer gal.hammer@huawei.com
Signed-off-by: Shai Fultheim shai.fultheim@huawei.com